-9-r=2r

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Solution for -9-r=2r equation:


Simplifying
-9 + -1r = 2r

Solving
-9 + -1r = 2r

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-2r' to each side of the equation.
-9 + -1r + -2r = 2r + -2r

Combine like terms: -1r + -2r = -3r
-9 + -3r = 2r + -2r

Combine like terms: 2r + -2r = 0
-9 + -3r = 0

Add '9' to each side of the equation.
-9 + 9 + -3r = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -3r = 0 + 9
-3r = 0 + 9

Combine like terms: 0 + 9 = 9
-3r = 9

Divide each side by '-3'.
r = -3

Simplifying
r = -3

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